Important Books & Reports

Glyphosate/Roundup, falsely claimed by Monsanto to be safe and harmless, has become the world’s most widely and pervasively used herbicide; it has brought rising tides of birth defects, cancers, fatal kidney disease, sterility, and dozens of other illnesses - more

Ban GMOs Now - Dr. Mae-Wan Ho and Dr. Eva Sirinathsinghji

Health & environmental hazards
especially in the light of the new genetics - more

Living Rainbow H2O - Dr. Mae-Wan Ho

A unique synthesis of the latest findings in the quantum physics and chemistry of water that tells you why water is the “means, medium, and message of life” - more

The Rainbow and the Worm - the Physics of Organisms - Dr. Mae-Wan Ho

“Probably the Most Important Book for the Coming Scientific Revolution” - more

New Cosmology

Many Things New around Our Electric Sun

On-going in situ measurements and sky mapping are revealing new and hidden structures in the magnetic plasma bubble around our Sun. Dr. Mae-Wan Ho

Supercomputer simulation of magnetic
loops on the Sun, NASA

The Sun is a ball of hot magnetized
plasma prone to flare-ups and mass ejections

The Sun has been watched and worshipped by
diverse cultures around the world for thousands, if not tens of thousands of
years [1]. It is a symbol of power and strength, of light and illumination, revered
and feared in equal measure for its overriding importance for sustaining life. As
befits its deity status, the Sun can only be watched from afar, the latest by
twin STEREO spacecrafts launched 26 October 2006 into Earth’s orbit, one ahead,
and one behind the planet [2], so that both the Sun’s front and back side can
be imaged at the same time. An almost complete 360˚ stereoscopic image was
finally achieved in February 2011. But since October 2014, contact has been
lost with STEREO B the one behind Earth’s orbit.

We know that the
Sun is a ball of hot magnetized plasma; by number of atoms, 91.2 % hydrogen,
8.7 % helium, 0.089 % oxygen, 0.043 % carbon, 0.0088 % nitrogen and smaller amounts
of silicon, magnesium, neon, iron and sulphur. Altogether, 67 elements have
been detected in the solar spectrum [3]. It has a diameter
~ 1 392 684 km, about 109 times that of Earth, and its mass 1.989×1030 kg ~330 000 times
that of Earth, accounts for 99.86 % of total mass of the solar system [4]. The Sun forms magnetic loops and arcades over its surface (see
supercomputer simulation at the beginning of this article). It is prone to sudden
eruptions in flares and mass ejections from its atmosphere (corona) which
extends millions of kilometres into space from its bright surface (photosphere)
(Figure 1).

Figure
1 Composite image of solar flares and a coronal mass ejection (bottom), University
of Colorado

Prodigious amounts
of power are released in solar flares along with huge numbers of high energy
electrons and a whole spectrum of electromagnetic radiation, from radio waves
to visible, uv, X-rays and γ-rays. Mass ejections send billions of tons of gas, mainly electrons
and protons, along with enormous amounts of electromagnetic energy into space causing
major disruption to the electricity grid when directed at Earth. Solar flares
and coronal mass ejections are part of a spectrum of solar activity, the
easiest to quantify are sunspots, dark patches that appear on the Sun’s
surface.

Solar activity follows a
cyclical pattern coinciding with a regeneration/reorganization of the Sun’s
large-scale magnetic field (Figures 2 and 3), which appears to exist in two
major components, a toroidal component (directed radially) and a poloidal
component (directed towards the poles), both of which undergo cyclical changes
with a period of 22 years [5]. It is widely believed that the cyclic
regeneration of the Sun’s magnetic field is at the root of solar activity, and
that the magnetic cycle is due to the inductive action somewhere inside the
Sun. A great deal of effort has been devoted into modelling the solar cycle in
terms of a solar dynamo, but “key questions relating to the explanatory
framework” remain unanswered. (We shall look at this problem again at the end
of this article.)

Figure
2 The sunspot ‘butterfly diagram’ showing the fractional coverage of sunspots
as a function of solar latitude and time (courtesy of D. Hathaway, NASA/MSFC)
[6, 7]

If the Sun has remained a
major mystery, what of the huge magnetic bubble, the heliosphere, that
surrounds the entire solar system and much more beyond?

Hidden structures of the heliosphere
unveiled

Beginning in the early 1960s, numerous
spacecrafts and missions have been launched to study the Sun and the solar
system [9, 10]. But the most amazing observations have come lately from NASA’s
Voyagers launched 38 years ago and the IBEX (Interstellar Boundary Explorer)
launched in 2008. They are overturning long-held assumptions of what the
heliosphere is like and raising important new questions.

The heliosphere (Figure 4) extends
well beyond the orbit of the outermost planet Pluto, dominated by the solar
wind blown out from the Sun’s corona (atmosphere) carrying particles at
supersonic speeds. As the solar wind begins to interact with the interstellar
medium, its velocity slows before finally stopping altogether. The point where
it becomes slower than the speed of sound (subsonic) is the termination shock.
Beyond that, the solar wind continues to slow as it passes through the heliosheath,
which is in turn bounded by the heliopause, where the interstellar
medium and the solar wind pressures balance [11]. Ahead of that is the bow
shock, a kind of shock wave created as the heliosphere moves through the
interstellar medium, rather like a mechanical wave that appears in front of a
boat speeding through water.

Figure
4 Artist’s impression of the heliosphere and the positions Voyager 1 and
Voyager 2 as they traversed the termination shock

The termination
shock was traversed by the twin spacecrafts, Voyager 1 in 2004 and Voyager 2 in
2007, and both have continued sending back data as they proceed in different
directions through the heliosheath across the heliopause and towards
interstellar space (see Fig. 4). Their measurements are raising questions over
the precise boundary between the heliopause and interstellar space, the
direction and magnitude of interstellar magnetic field and whether the bow shock
exists.

NASA’s IBEX
(Interstellar Boundary Explorer) mission was launched 19 October 2008 to map
the entire heliosphere, to discover the nature of the interactions between the
solar wind and the interstellar medium [12]. These interactions create energetic
neutral atoms (ENAs) that move very quickly in straight lines from where they
were created, being unaffected by electric or magnetic fields. IBEX measures
the particles that happen to be travelling inward from the boundary of the
heliosphere with two detectors designed to collect and measure ENAs. From this
data, maps of the heliosphere boundary would be created.

A bright ribbon across the sky

IBEX first all-sky map of the heliosphere
have taken researchers “by surprise” [13]. It showed “a bright winding ribbon
of unknown origin… a shocking new result,” said IBEX principal investigator
Dave McComas of the Southwest Research Institute. “We had no idea this ribbon
existed or what has created it. Our previous ideas about the outer heliosphere
are going to have to be revised.” This ribbon was made up of particularly high density
of the ENAs that IBEX was looking for.

Unlike the Voyager
spacecrafts that have been travelling to the edge of the solar system for in
situ sampling, IBEX stays close to home. It is in orbit around Earth,
collecting ENAs in all directions, giving it a unique panoramic view necessary
to discover something as vast as the ribbon (Figure 5).

Figure
5 IBEX ribbon of enhanced ENA flux across the sky

The ribbon, almost a complete
circle, runs perpendicular to the direction of the galactic magnetic field just
outside the heliosphere [13] (Figure 6). More detailed analysis shows that the
ribbon is likely centred on the direction of the local interstellar medium
(LISM) magnetic field [14].

Figure 6 IBEX ribbon perpendicular to galactic magnetic field

Local interstellar medium accounts of
anisotropy of high energy Tev cosmic rays

IBEX measurements, which establish a local
interstellar magnetic field direction [14], also solve another long standing puzzle:
the anisotropy of high energy (teraelectron volts TeV = 1012 eV)
cosmic rays as mapped from ground-based high-energy cosmic-ray observatories
(Milagro, Asγ, and IceCube).

IBEX provided updated values
for the velocity vector of the heliosphere through the local interstellar cloud
(LIC), and the direction of the LISM magnetic field from the centre of the IBEX
ribbon of ENA emissions. These results show that the interstellar flow through
the local standard of rest (LSR) is nearly perpendicular (87.6˚ +
3.0˚) to the LISM magnetic field direction. (The LSR is the velocity frame
in which the mean motion of the oldest stars in the Milky Way in the
neighbourhood of the Sun is zero, and is the reference frame in which cosmic
rays assume near uniformity in velocity directions.) The LISM magnetic field
direction from the ribbon centre is within ~33˚ + 20˚ of the
magnetic field direction derived by interstellar polarization data from stars
within 40 pc (parsec, a unit of distance in astronomy; one parsec corresponds to the distance at which the mean
radius of the earth's orbit subtends an angle of one second of arc, and is equal to about 3.26 light years or 3.086 x 1013
km). In their paper [14], the researchers showed that the anisotropy maps of
high-energy TeV cosmic rays likely provide independent confirmation of the
interstellar magnetic field orientation inferred from the ribbon centre.

The flux of TeV
galactic cosmic rays varies as a function of look direction in the sky. The
large-scale structure in the TeV GCR sky consists of two broad asymmetries with
flux variations of ~0.2 %: a deficit of GCR flux at high galactic latitudes and
an excess of flux in the heliotail direction. Small-scale TeV anisotropies
(<~10 %) in cosmic-ray arrival direction possibly arise from cosmic-ray
propagation in a turbulent magnetic field. Because TeV GCRs have radii of
gyration ~700 AU (astronomical unit, the mean distance from the centre of Earth
to the centre of the Sun, 1 AU = 149.6
million kilometres) in the LISM, the observed GCR
asymmetries must originate in the immediate interstellar environment of the
Sun.

Cosmic rays are largely
guided by the interstellar magnetic field. In their model, a small ratio of
perpendicular to parallel diffusion of 0.3 % is assumed, given an interstellar
flow nearly perpendicular to the magnetic field direction on the basis of IBEX
observations. The LISM magnetic field is further modelled to be deflected
around the heliosphere. A sky map is then constructed of cosmic ray flux as
viewed from the Sun. The result of the simulation is broadly comparable with
the observations (Figure 7).

Figure 7
Observed and predicted anisotropy of TeV cosmic ray flux

IBEX has also mapped the
boundaries of the heliotail for ENAs [15]. There are two lobes of slower
particles on the sides and fast particles above and below, with the entire
structure twisted (Figure 8). This pattern is consistent with the fact that the
Sun has been sending out mostly fast solar wind near its poles and slower wind
near its equator for the past few years.

Figure 8 IBEX ENA map of the heliotail [8]

Heliosphere much smaller than previously thought

Another big surprise is that the heliotail
is much shorter than previously thought. For decades, the heliosphere was believed
to be shaped like a comet with a very long tail extending some 747 billion km,
and a nose protected by a bow shock as it comes up against the interstellar
magnetic field. The latest study, however, suggests that the heliosphere is
dominated by two giant jets emanating from the Sun’s north and south poles and
curving round in two relatively short tails toward the back, confined by
interaction with the interstellar magnetic field [16]. The two jets are similar
to other astrophysical jets seen in space, which are usually bipolar streams of
matter ejected along the axis of rotation of bright compact bodies at the
centre of certain galaxies, quasars and stars. This observation is also
consistent with the IBEX ENA map of the heliotail (Fig. 8).

Lead author Merav Opher,
astronomer at Boston University, and her colleagues found the jets and
determined the new shape when they adjusted simulations of the heliosphere
based on observations collected by Voyager 1, which they thought had recently
moved outside the heliosphere into interstellar space (though this is disputed
by others). If there were no interstellar flow, the magnetic fields around the
sun would confine the jets and they would be pointing straight north and south.

Researchers have already
found that the nose of the heliosphere is much shorter than expected. The entire
heliosphere is only about 250 times the distance between Earth and the Sun,
i.e., ~37 billion km, 20 times shorter than before.

Both Cassini (a previous
mission) and IBEX have gathered information about the tail end of the
heliosphere by looking at ENAs. Cassini data show a similar amount of ENAS from
the tail and the nose, suggesting that the size of both sides was similar. The
heliosphere is most likely spherical, and not at all elongated at the tail like
a comet.

No bow shock

Moreover, there appears to be no bow shock
[17]. IBEX shows that the Sun is still located within the local interstellar
cloud. The Sun’s relative motion with respect to the interstellar medium is
23.2 + 0.3 km s-1 as opposed to the old value of 26.3 km s-1
estimated from a previous mission Ulysses. This produces ~22 % less dynamic
pressure, enhancing the importance of the external magnetic pressure compared
with dynamic pressure. A simple analytical model shows that for an external
magnetic field strength >0.22 nT, the bow shock completely disappears. Using
simulations from independent, state-of-the-art models from the Huntsville and
Moscow groups, the results give a weak bow shock for 0.2 nT, which spans only a
few simulation grid cells, no bow shock at 0.3 nT, although a build-up in
density extends in from ~500 AU; and no jump at all at 0.4 nT, with a build-up
in density starting at the edge of the simulation (1 000 AU).

Given the IBEX velocity of
the LISM and including nonlinear heating of the very local ISM near the
heliosphere, the researchers further showed that no reasonable combination of
external field, density, and temperature will produce a bow shock.

Voyager 1 finds no change in magnetic
field direction at boundary of heliosphere

Among the most remarkable finding from
Voyager 1 is the unchanging magnetic field direction as it crossed into a
boundary region of the heliosheath. Magnetic field measurements showed that
the spacecraft crossed the boundary of an unexpected region five times between
day 210 and ~238 in 2012 [18]. The magnetic field strength B increased
across this boundary from ~0.2 to >0.4 nT and remained so until at least day
270 2012. The strong magnetic fields were associated with unusually low
counting rates of >0.5 MeV particles (Figure 9). The direction of B
did not change significantly across any of the five boundary crossings. It
was very uniform and very close to the spiral magnetic field direction observed
throughout the heliosheath. The observations indicate that Voyager 1 entered a
region of the heliosheath that is now referred to as the heliosheath depletion
region (HDR), rather than the interstellar medium, because an interstellar
magnetic field strength of this magnitude or greater has been ruled out by IBEX
measurements.

Voyager 1 measurements also
reveal that particles of solar origin at Voyager 1 located 18.5 billion
kilometres (123 AU) from the Sun decreased by a factor of >103 on
25 August 2012, while those of galactic origin (cosmic rays) increased by 9.3 %
simultaneously [19]. Intensity changes appeared first for particle moving in
the azimuthal direction and were followed by those moving in the radial and
anti-radial directions with respect to the solar radius vector.

There was anisotropy in the
measurements of ACRs (anomalous cosmic rays) and GCRs (galactic cosmic rays).
ACRs with kinetic energy ~10-100 MeV/nucleus originate within the heliosphere,
and are distinct from GCRs of interstellar origin. The depletions of ~4 MeV
protons in the ACRs depended on the direction of motion of the particles with
respect to the local magnetic field. Particles gyrating perpendicular to the
magnetic field were depleted least, whereas those moving parallel to the field
were depleted most. The GCRs on the other hand, were roughly isotropic in mid-2012
but became gradually anisotropic during the brief spike in intensity and
remained so after the final increase. There was a depletion of particles
perpendicular to the magnetic field, because they cannot readily enter from the
outside.

The observations present a
compelling case that Voyager 1 has crossed into a region of space that could be
labelled heliospheric depletion region (HDR), where hot heliosheath particles
are undetectable at energies >40 keV.

No existing model
predicted either the extreme sharpness of the edge for all particle species or
the invariant magnetic field direction across the edge during the crossing on
day 238 of 2012.

The researchers suggest an
‘interchange instability” that allows the cold high “magnetic field flux tube”
(field-aligned Birkeland current?) to enter the heliosheath from the local
interstellar medium facilitated by the tangential direction of the magnetic
field being the same on both sides of the boundary. A LISM (local insterstellar
medium) flux tube with strong magnetic field and containing only GCRs and cold
interstellar plasma that becomes embedded into the edge of the hot heliosheath
by the instability will tend to move deeper within the heliosheath. It will
then begin to be populated with hot ions, first at 90 pitch angles and then at
all other angles. At the same time the GCRs will slowly leak out of the flux
tube into the heliosheath, thus decreasing their intensity. All the while the
magnetic field will keep most of its outside value in order to maintain pressure
balance. This electrical connection with the interstellar medium may be crucial
for the heliosphere.

The heliospheric circuit closes outside
the Sun

Is the Voyager 1 actually in the
interstellar medium? One key piece of evidence is that the direction of the
magnetic field has not changed, even though its intensity has more than doubled,
coinciding with sharp discontinuities in the relative abundance of galactic versus
heliospheric cosmic rays and energetic (>0.5 MeV) heliospheric particles.
Some researchers are of the opinion that Voyager 1 has yet to cross the
heliopause [20]. Others, such as proponent of the Electric Universe Wal
Thornhill, are taking this to indicate a direct connection of our Sun to the
general galactic circuit of the Milky Way [21].

However, it is
important to stress that the Sun is a dynamo that generates its own electrical
power in a circuit that is locally closed, and modelled as such [5]. But the
possibility remains that it is also distantly connected, as implicit in the heliospheric
circuit [22] proposed by Hannes Alfvén, the father of plasma astrophysics. I
have redrawn his diagram in a symmetrical form (Figure 10).

Figure 10 Alfvén’s heliospheric circuit

Alfvén proposed that the rotating magnetized Sun acts as a unipolar
inductor A producing a current that during odd solar cycles goes outwards along
the axis B2 (as field-aligned Birkeland currents with double layers DL) in both
directions and inward in the equatorial plane B1. The current closes at large
distances B3, but “we do not know where.” The equatorial current layer is often
very inhomogeneous. “Further, it moves up and down like the skirt of a
ballerina.” In even solar cycles, the direction of the current is reversed. By
analogy with Earth’s magnetospheric circuit, we may expect the heliopheric
circuit to have double layers and should be located at the axis of symmetry,
but only in those solar cycles where the axial current is directed away from
the Sun.

Alfvén first published his conceptual model in 1981, but little or
no work has been done to follow up the idea until 2001 when a team of
researchers from Tel Aviv University in Israel and University of Michigan Ann
Arbor in the United States carried out a magneto hydrodynamic (MHD) simulation
of the three-dimensional structure of the heliosphere [23].

The existence of the radial component of the electric
current flowing toward the Sun is revealed in the numerical simulation. The
total strength of the radial current is ~3 x 109 A. The only way to
fulfil the electric current continuity is to close the radial electric current
by means of field-aligned currents at the polar region of the Sun. Thus the
surface density of the closure current flowing along the solar surface can be
estimated as ~4A/m, and the magnetic field produced by this current is B~5 µT (0.05G), i.e., several % of
the intrinsic magnetic field of the Sun (~1 G).

Solar
wind outflow from the Sun causes magnetic field lines originating from opposite
hemispheres to extend radially outward and brings them together near the
equatorial plane. These field lines are of opposite magnetic polarities and
thus the interplanetary field must change sign abruptly within the narrow layer
near the equatorial plane. This implies the presence of a thin sheet of a very
high current density. The current circulates around the dipole axis in the same
direction as the original current generating the dipole field. It is this
heliospheric current sheet that separates fields and plasma flows from
different hemisphere.

Rotation
of the Sun twists the interplanetary magnetic field lines in such a way that
they take the shape of Archimedean spiral. Another effect of the rotation is
warping the current sheet plane into a structure that resembles a ballerina’s
skirt. Yet a further consequence of solar rotation and magnetic field line
twisting was predicted by Alfven. The spiral form of the magnetic field lines
means that there is a significant radial as well as azimuthal component of the
electric current in the sheet.

In Figure 11 (left), solid lines are the magnetic field
lines slightly above the magnetic equator whereas dashed lines correspond to
those slightly below the equatorial plane; the electric currents (empty lines)
are also spirals. The only way to satisfy the electric current continuity is to
close the radial electric current by field-aligned currents at the polar region
of the Sun. This current closure leads to the three dimensional heliospheric
current system schematically depicted by Alfvén (Figure 11 right). Thus, the
heliospheric current system produced by the Sun acts like a unipolar generator
or dynamo.

Figure 11 Interplanetary magnetic field lines
and electric current in the solar wind near the heliospheric current sheet
(left), and heliospheric current circuit in the meridional plane (right)

The three-dimensional structure of the heliospheric current
system obtained from a self-consistent, first-principles based numerical model
of the solar wind outflow with realistic intrinsic solar magnetic field is
consistent with Alfven’s conceptual model.

Continuity of the electric current requires the radial
component closure through the solar atmosphere as sketched in Fig. 11 right.
The researchers were able to follow this closure. A polar view of isolines of
the radial current on the Sun’s surface shows that near the magnetic pole the
current flows from the Sun. But the region of upward current is
surrounded by downward current. This picture is reminiscent of the regions of
field aligned currents in the Earth’s polar ionosphere (see [24] Earth's
Magnetized Plasma Shield & Earth-Sun Connection, SiS 68), where there is current
circuit closure on Earth, yet a direction connection to the Sun is maintained).
Results of calculations show that there is a continuous transition from
positive to negative value of the radial electric current near the magnetic
pole. All the regions within the ring of downward negative field-aligned
current are filled by the positive upward current.

The model did not address closure of the circuit outside
the heliosphere; nor does any other dynamo model of solar activity [5], and
perhaps that is part of the difficulty involved in providing satisfactory
explanations.

One could envisage (as Alfvén did) the entire Plasma Electric
Universe being interconnected via field-aligned currents of appropriate
dimensions, scaled upwards from Earth-size to interstellar, galactic, and
beyond in something like a universal electricity grid. In analogy with a power
grid on Earth, interconnectivity enables long-distance transmission, but it
also allows disturbances to propagate, causing large-scale blackouts and
electrical explosions, and indeed grid system structure and vulnerability is an
active area of current research [25]. These studies indicate that local
electricity generation (and storage) as well as a certain degree of clustering
and isolation from the main power generators are necessary for stability and
safety. For the Sun, the most conspicuously known major power generator is the
centre of the Milky Way galaxy, reputedly a supermassive black hole with a
supermagnetic field over it [26]. It would not be surprising, therefore, if the
Sun’s immediate remote circuit closure is somewhere within the local
interstellar cloud, several ‘nodes’ removed from the galactic centre.